12925520 has 20 divisors (see below), whose sum is σ = 30052020. Its totient is φ = 5170176.

The previous prime is 12925519. The next prime is 12925531. The reversal of 12925520 is 2552921.

It can be written as a sum of positive squares in 2 ways, for example, as 7203856 + 5721664 = 2684^2 + 2392^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 12925520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80705 + ... + 80864.

It is an arithmetic number, because the mean of its divisors is an integer number (1502601).

Almost surely, 2^12925520 is an apocalyptic number.

12925520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12925520 is an abundant number, since it is smaller than the sum of its proper divisors (17126500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12925520 is a wasteful number, since it uses less digits than its factorization.

12925520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161582 (or 161576 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12925520 is about 3595.2079216646. The cubic root of 12925520 is about 234.6835638372.

The spelling of 12925520 in words is "twelve million, nine hundred twenty-five thousand, five hundred twenty".